<script setup lang="ts">
import { getCategoryFilterAPI, getSubCategoryAPI } from '@/api/category.ts';
import { CategoryChild, NavigationDataRequest } from '@/api/model/categoryModel.ts';
import GoodsItem from '@/views/Home/components/GoodsItem.vue';
import { onMounted, ref } from 'vue';
import { useRoute } from 'vue-router';

const route = useRoute();

//获取二级分类
const categoryData = ref({} as CategoryChild);
const getCategoryData = async () => {
  const res = await getCategoryFilterAPI(route.params.id as string);
  categoryData.value = res.result;
};
onMounted(() => getCategoryData());

// //获取基础数据渲染
// eslint-disable-next-line no-undef
const goodList = ref([] as Good_Pt[]);
// 请求参数
const reqData = ref({
  categoryId: route.params.id,
  page: 1,
  pageSize: 20,
  sortField: 'publishTime'
} as unknown as NavigationDataRequest);
// 请求数据函数
const getGoodList = async () => {
  const res = await getSubCategoryAPI(reqData.value);
  goodList.value = res.result.items;
};
onMounted(() => getGoodList());

//实现tab切换更新筛选条件
//思路：tab组件切换时修改reqData中的sortField字段，重新拉取接口列表
const tabChange = () => {
  // console.log('tab切换', reqData.value.sortField)
  //注意令page重置回第一页
  reqData.value.page = 1;
  getGoodList();
};

// 基础思路;
// 1. 触底条件满足之后 page++，拉取下一页数据;
// 2. 新老数据做数组拼接;
// 3. 判断是否已经全部加载完毕，停止监听;
//定义是否监听滑到底部
const disabled = ref<boolean>(false);
//实现无限加载功能
const load = async () => {
  //更新请求页数
  reqData.value.page++;
  //重新发送请求
  const res = await getSubCategoryAPI(reqData.value);
  goodList.value = [...goodList.value, ...res.result.items];
  if (res.result.items.length === 0) {
    //没有响应数据时停止监听
    disabled.value = true;
    return;
  }
};
</script>

<template>
  <div class="container">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/category/${categoryData.parentId}` }">
          {{ categoryData.parentName }}
        </el-breadcrumb-item>
        <el-breadcrumb-item>{{ categoryData.name }}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs v-model="reqData.sortField" @tab-change="tabChange">
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <div class="body" v-infinite-scroll="load" :infinite-scroll-disabled="disabled">
        <!-- 商品列表-->
        <GoodsItem v-for="good in goodList" :good="good" :key="good.id"></GoodsItem>
      </div>
    </div>
  </div>
</template>

<style lang="scss" scoped>
.bread-container {
  padding: 25px 0;
  color: #666;
}

.sub-container {
  padding: 20px 10px;
  background-color: #fff;

  .body {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .goods-item {
    display: block;
    width: 220px;
    margin-right: 20px;
    padding: 20px 30px;
    text-align: center;

    img {
      width: 160px;
      height: 160px;
    }

    p {
      padding-top: 10px;
    }

    .name {
      font-size: 16px;
    }

    .desc {
      color: #999;
      height: 29px;
    }

    .price {
      color: $priceColor;
      font-size: 20px;
    }
  }

  .pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }
}
</style>
